readlink 命令

常用示例

说明

readlink prints the value of a symbolic link or the canonical path of a file. Without options, it displays the immediate target of a symlink (one level only). The canonicalize options (-f, -e, -m) resolve the complete path by following all symbolic links, resolving references to /./ and /../, and returning an absolute pathname. The difference is how they handle non-existent components: - -f: All components except the last must exist - -e: All components must exist (strictest) - -m: No existence requirements (most permissive) This is commonly used in scripts to find the real location of files or to get absolute paths from relative ones.

参数

-f, --canonicalize

Canonicalize by following every symlink recursively; all components must exist

-e, --canonicalize-existing

Canonicalize, but all components must exist

-m, --canonicalize-missing

Canonicalize without requiring components to exist

-n, --no-newline

Do not output trailing newline

-q, --quiet

Suppress error messages

-s, --silent

Suppress error messages (same as -q)

-v, --verbose

Report error messages

-z, --zero

End each output line with NUL, not newline

--help

Display help and exit

--version

Output version information and exit